Samuel grossiord



\ Patentud Oct. 23, I900. S. GROSSIORD. I MANUFACTURE OF ARTIFICIALSTONES. ("a In. (Applioltion fllnd Oct. 6, 1898.)

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WITNESSES: INVENTOR 8IIMUEL GROSSI'ORD v V v BY I um TNE Noam: PETERScu. mo roumm WASHINGTON, n. c.

' UNITED STAT S PATENT OFFICE.

SAMUEL GROSSIORD, OF AUX MOUSSIERES, FRANCE.

MANUFACTURE OF ARTIFICIAL STONES;

SPECIFICATION forming part of Letters Patent No. 660,426,- dated October23, 1900;

Application filed October 6, 1898. Serial No. 6532;837. (Nu specimens.)

To ctZZ whom it may concern.-

Be it known that I, SAMUEL GROSSIORD, lapidary, a citizen of theRepublic of France, residing at Aux Moussieres, Jura, in the Republic ofFrance, have invented certain new and useful Improvements in theManufacture of Artificial Stones, of which the following is aspecification.

This invention relates to improvements in the manufacture of artificialstones employed in jewelry.

The object of the invention is to impart to such stones if they arewhite imitations a scintillation resembling as nearly as possible thatof a real diamond and if they are dilferentlycolored imitationsclearly-defined and distinct colorations.

The essential feature of myinvention consists in Welding a sheet orplate of windowglass between two blocks of the imitation productscommonly termed paste and then cutting the block thus formed in theordinary manner. On the same principle a white or colored block of theimitation material may be inserted between two plates ofwindow-glass,or,in other words,the above process may be reversed. It is,moreover, possible to use but one single block of white or coloredimitation material welded on a single plate of window-glass, whichlatter after the cutting forms either the base or the top of the stone.

In order that my invention may be thoroughly understood, I will describethe same with reference to the accompanying drawings, in which- Figure lis a perspective view showing two blocks a and b of imitation materialof one and the same quality and a sheet or plate 0 of window-glassadapted to be interposed between the two masses or blocks of imitationmaterial. Fig. 1 is a perspective view representing a block Ct ofimitation material and two sheets or plates 0 and c of window-glass,between which the said block a is to be interposed. These differentpieces are arranged in the order indicated in Figs. 1 and 1respectively, upon a recess fireproof table and then placed in thefurnace in order to efifect the welding together by producing asemifusion of the material under treatment. Fig.

glass.

2 illustrates the aspect which the blocks a and b of imitation materialbear after hav ing been welded upon the opposite faces of the plate 0.The appearance is that of a block in which the glass plate 0 separatesthe two blocks of imitation material a and b. Fig. 2 illustrates theaspect which the block or of imitation material assumes after havingbeen welded between the two pieces or plates 0 c. Fig. 3 shows theaspect of'the blocks a and b of differently-colored imitation materialsafter the welding upon one plate a.

The blocks thus produced irrespective of whether the masses or pieces ofimitation material be colored or colorless are subsequently cut in theordinary manner, but so that. the parts of imitation material aand b,respectively, form one the top and the other the base, while thewindow-glass plate 0 forms the crown. I

When the blocks of imitation material CL and b are colorless, the crownc of glass produces the following effect: As the plate 0 of glass isclearer and more transparent than the blocks a and b of imitationmaterialit, causes the facets cut into the top and the base to moreefiiciently reflect and imparts to the stone'thus formed scintillationsand a fire similar to that of a real diamond.

When the blocks a and b of imitation subtauce are variously colored, thewindow-glass crown 0 produces the effect hereinafter indicated. First ofall, seeing that the fusingpoint of the glass is higher than that of theimitation substance the window-glass plate 0 has not entered intocombination with the blocks 0t and b, which have retained their propercolor. Moreover, owing to the transparency of the window-glass the colorof the base will when the cutting has been eifected appear all aroundthe stone, without, however, penetrating to the top, where the colorremains more intense and appears distinctly in the middle of the stone.

The cutting may of course be effected in any way and the number offacets does not in any manner modify the efiect produced.

Fig. 3 shows by way of modification a block of white or coloredimitation material welded onto a plate or sheet a of window- Thismodification is shown in section and in perspective yiew. The block thusproduced is subsequentlycut in such a man'- ner that the glass eith'erforms the base, Fig; 4:, or the top; Fig. 5. Theresult obtained in thecase of this modification is identical with that before indicated.

It should finally be observed that in each' one of the precedingexamples the face or faces of the imitation substance in contact withthe glass plate or plates may be polished prior to the Weldingoperation.

I claim as my invention 1. As a new article-of manufacture, atartificial stone'for use in jewelry, consisting of clear trans arentWindowlass and aste a name to this specification in the welded together,into a single piece, substan tially as" described.

2; As a new'article of manufacture, an artificial stone for use injewelry, consisting of a top and bottom piece of paste and anintermediate layer of clear transparent Win- (low-glass elded togetherinto a single piece,

substantially as described.

In testimony whereof I have signed my two subscribing witnesses.

w SAMUEL GROSSIORD;

Witnesses. V

THos. N. ,BRoNNE, MARIUS VIOHOY;

presence of a

